Patents by Inventor Gregory Scot Corman
Gregory Scot Corman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20100284810Abstract: A process for inhibiting delamination in a bend of a component formed of a continuous fiber-reinforced composite material having layers containing arrays of unidirectional fibrous elements in a matrix material. A preform of the component is formed by laying-up prepreg tapes corresponding to layers of the component. Each tape contains a matrix precursor, a binder, and an array of the fibrous elements. The tapes are laid-up so that the fibrous elements of at least a first tape traverse the bend, and the fibrous elements lie in planes that are not perpendicular to the axis of curvature of the bend. The preform then undergoes thermal processing, during which delamination of the layers in the bend is inhibited as a result of none of the fibrous elements lying in a plane perpendicular to the axis of curvature of the bend.Type: ApplicationFiled: May 7, 2009Publication date: November 11, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Gregory Scot Corman, Henry Charles McGuigan
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Patent number: 7708851Abstract: A CMC article and process for producing the article to have a layer on its surface that protects a reinforcement material within the article from damage. The method entails providing a body containing a ceramic reinforcement material in a matrix material that contains a precursor of a ceramic matrix material. A fraction of the reinforcement material is present and possibly exposed at a surface of the body. The body surface is then provided with a surface layer formed of a slurry containing a particulate material but lacking the reinforcement material of the body. The body and surface layer are heated to form the article by converting the precursor within the body to form the ceramic matrix material in which the reinforcement material is contained, and by converting the surface layer to form the protective layer that covers any fraction of the reinforcement material exposed at the body surface.Type: GrantFiled: October 25, 2005Date of Patent: May 4, 2010Assignee: General Electric CompanyInventors: Gregory Scot Corman, Henry Charles McGuigan, Milivoj Konstantin Brun
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Publication number: 20090214845Abstract: A CMC article and process for producing the article to have a layer on its surface that protects a reinforcement material within the article from damage. The method entails providing a body containing a ceramic reinforcement material in a matrix material that contains a precursor of a ceramic matrix material. A fraction of the reinforcement material is present and possibly exposed at a surface of the body. The body surface is then provided with a surface layer formed of a slurry containing a particulate material but lacking the reinforcement material of the body. The body and surface layer are heated to form the article by converting the precursor within the body to form the ceramic matrix material in which the reinforcement material is contained, and by converting the surface layer to form the protective layer that covers any fraction of the reinforcement material exposed at the body surface.Type: ApplicationFiled: April 8, 2009Publication date: August 27, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Gregory Scot Corman, Henry Charles McGuigan, Milivoj Konstantin Brun
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Publication number: 20090053050Abstract: A support apparatus for a gas turbine shroud is disclosed. The apparatus includes an outer shroud block having a coupling connectable to a casing of the gas turbine and a shroud component having a forward flange and an aft flange. The shroud component is attached to the outer shroud block via the forward flange and the aft flange. The apparatus further includes a damper disposed between the outer shroud block and the shroud component and a biasing element disposed within the outer shroud block. A translational degree of freedom between the damper and the outer shroud block defines a direction of motion of the damper. The biasing element is in operable connection between the outer shroud block and the shroud component via the damper, a bias force of the biasing element directed along the direction of motion of the damper.Type: ApplicationFiled: August 23, 2007Publication date: February 26, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Kevin Leon Bruce, Ronald Ralph Cairo, Ronald Phillip Nimmer, Curtis Alan Johnson, Gregory Scot Corman, Herbert Chidsey Roberts, III
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Patent number: 7434670Abstract: A shroud support method and apparatus for a ceramic component of a gas turbine having: an outer shroud block having a coupling to a casing of the gas turbine; a spring mass damper attached to the outer shroud block and including a spring biased piston extending through said outer shroud block, wherein the spring mass damper applies a load to the ceramic component; and the ceramic component has a forward flange and an aft flange each attachable to the outer shroud block.Type: GrantFiled: August 16, 2006Date of Patent: October 14, 2008Assignee: General Electric CompanyInventors: Randall Richard Good, Kevin Leon Bruce, Gregory Scot Corman, David Joseph Mitchell, Mark Stewart Schroder, Christopher Grace
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Publication number: 20080202877Abstract: A shroud support method and apparatus for a ceramic component of a gas turbine having: an outer shroud block having a coupling to a casing of the gas turbine; a spring mass damper attached to the outer shroud block and including a spring biased piston extending through said outer shroud block, wherein the spring mass damper applies a load to the ceramic component; and the ceramic component has a forward flange and an aft flange each attachable to the outer shroud block.Type: ApplicationFiled: August 16, 2006Publication date: August 28, 2008Applicant: General Electric CompanyInventors: Randall Richard Good, Kevin Leon Bruce, Gregory Scot Corman, David Joseph Mitchell, Mark Stewart Schroder, Christopher Grace
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Publication number: 20070099527Abstract: In a method of coating a CMC fiber, a multiplicity of fiber tows aligned as a ribbon are simultaneously passed through a reactor and a flow of fiber coating reactant is passed though the reactor to coat the tow fibers. A coating system comprises a reactor chamber to accommodate a multiplicity of fiber tows passing along a path substantially parallel to a longitudinal axis of the chamber and a flow of fiber coating reactant and an aligning structure at an end of the chamber to maintain the multiplicity of fiber tows in a narrow, elongated ribbon configuration. An article comprises a multiplicity of fiber tows aligned in a longitudinal planar array in the form of a ribbon.Type: ApplicationFiled: November 1, 2005Publication date: May 3, 2007Applicant: General Electric CompanyInventors: Milivoj Konstantin Brun, Krishan Lal Luthra, Henry Charles McGuigan, Gregory Scot Corman
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Patent number: 7117983Abstract: A shroud support apparatus for a ceramic component of a gas turbine having: an outer shroud block having a coupling to a casing of the gas turbine; a spring mass damper attached to the outer shroud block and including a spring biased piston extending through said outer shroud block, wherein the spring mass damper applies a load to the ceramic component; and the ceramic component has a forward flange and an aft flange each attachable to the outer shroud block.Type: GrantFiled: March 5, 2004Date of Patent: October 10, 2006Assignee: General Electric CompanyInventors: Randall Richard Good, Kevin Leon Bruce, Gregory Scot Corman, David Joseph Mitchell, Mark Stewart Schroder, Christopher Grace
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Patent number: 6910853Abstract: A structure for attaching together or sealing a space between a first component and a second component that have different rates or amounts of dimensional change upon being exposed to temperatures other than ambient temperature. The structure comprises a first attachment structure associated with the first component that slidably engages a second attachment structure associated with the second component, thereby allowing for an independent floating movement of the second component relative to the first component. The structure can comprise split rings, laminar rings, or multiple split rings.Type: GrantFiled: November 27, 2002Date of Patent: June 28, 2005Assignee: General Electric CompanyInventors: Gregory Scot Corman, Anthony John Dean, Leonardo Tognarelli, Mario Pecchioli
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Patent number: 6884030Abstract: A method for securing a nozzle for a turbine is provided. The nozzle includes an airfoil having a suction side and a pressure side connected at a leading edge and a trailing edge such that a cooling cavity is defined within the airfoil, the airfoil extending between an inner band and an outer band. The method includes extending at least one member through the airfoil, and at least one of the inner band and the outer band. The method further includes securing the nozzle assembly in position with at least one fastener such that the at least one member is coupled adjacent to at least one of the inner band and the outer band.Type: GrantFiled: December 20, 2002Date of Patent: April 26, 2005Assignee: General Electric CompanyInventors: Toby George Darkins, Jr., Daniel Gene Dunn, Christopher Grace, Gregory Scot Corman, Mark Stewart Schroder
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Publication number: 20040120811Abstract: A method for securing a nozzle for a turbine is provided. The nozzle includes an airfoil having a suction side and a pressure side connected at a leading edge and a trailing edge such that a cooling cavity is defined within the airfoil, the airfoil extending between an inner band and an outer band. The method includes extending at least one member through the airfoil, and at least one of the inner band and the outer band. The method further includes securing the nozzle assembly in position with at least one fastener such that the at least one member is coupled adjacent to at least one of the inner band and the outer band.Type: ApplicationFiled: December 20, 2002Publication date: June 24, 2004Inventors: Toby George Darkins, Daniel Gene Dunn, Christopher Grace, Gregory Scot Corman, Mark Stewart Schroder
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Patent number: 6548130Abstract: A coating is applied to reinforcing fibers arranged into a tow by coaxially aligning the tow with an adjacent separation layer and winding or wrapping the tow and separation layer onto a support structure in an interleaved manner so that the separation layer separates a wrap of the tow from an adjacent wrap of the tow. A coating can then be uniformly applied to the reinforcing fibers without defects caused by fiber tow to fiber tow contact. The separation layer can be a carbon fiber veil.Type: GrantFiled: September 19, 2000Date of Patent: April 15, 2003Assignee: General Electric CompanyInventor: Gregory Scot Corman
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Patent number: 6503441Abstract: A method for producing shaped articles of ceramic composites provides a high degree of dimensional tolerance to these articles. A fiber preform is disposed on a surface of a stable formed support, a surface of which is formed with a plurality of indentations, such as grooves, slots, or channels. Precursors of ceramic matrix materials are provided to the fiber preform to infiltrate from both sides of the fiber preform. The infiltration is conducted under vacuum at a temperature not much greater than a melting point of the precursors. The melt-infiltrated composite article substantially retains its dimension and shape throughout the fabrication process.Type: GrantFiled: May 30, 2001Date of Patent: January 7, 2003Assignee: General Electric CompanyInventors: Gregory Scot Corman, Milivoj Konstantin Brun, Henry Charles McGuigan
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Publication number: 20020180120Abstract: A method for producing shaped articles of ceramic composites provides a high degree of dimensional tolerance to these articles. A fiber preform is disposed on a surface of a stable formed support, a surface of which is formed with a plurality of indentations, such as grooves, slots, or channels. Precursors of ceramic matrix materials are provided to the fiber preform to infiltrate from both sides of the fiber preform. The infiltration is conducted under vacuum at a temperature not much greater than a melting point of the precursors. The melt-infiltrated composite article substantially retains its dimension and shape throughout the fabrication process.Type: ApplicationFiled: May 30, 2001Publication date: December 5, 2002Inventors: Gregory Scot Corman, Milivoj Konstantine Brun, Henry Charles McGuigan
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Patent number: 6403158Abstract: A mixture is formed that comprises at least some to about 10 wt % boron nitride and silicon. A body comprising a component that is wetted by or reacts with silicon is contacted with the mixture and the contacted body is infiltrated with silicon from the mixture.Type: GrantFiled: March 5, 1999Date of Patent: June 11, 2002Assignee: General Electric CompanyInventor: Gregory Scot Corman
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Patent number: 6365233Abstract: A fiber-reinforced silicon-silicon carbide matrix composite having improved oxidation resistance at high temperatures in dry or water-containing environments is produced. The invention also provides a method for protecting the reinforcing fibers in the silicon-silicon carbide matrix composites by coating the fibers with a silicon-doped boron nitride coating.Type: GrantFiled: June 10, 1999Date of Patent: April 2, 2002Assignee: General Electric CompanyInventors: Gregory Scot Corman, Krishan Lal Luthra
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Patent number: 6315519Abstract: A turbine inner shroud and a turbine assembly. The turbine assembly includes a turbine stator having a longitudinal axis and having an outer shroud block with opposing and longitudinally outward facing first and second sides having open slots. A ceramic inner shroud has longitudinally inward facing hook portions which can longitudinally and radially surround a portion of the sides of the outer shroud block. In one attachment, the hook portions are engageable with, and are positioned within, the open slots.Type: GrantFiled: April 27, 1999Date of Patent: November 13, 2001Assignee: General Electric CompanyInventors: Bharat Sampathkumaran Bagepalli, Gregory Scot Corman, Anthony John Dean, Paul Stephen DiMascio, Massoud Mirdamadi
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Patent number: 6168827Abstract: A coating is applied to reinforcing fibers arranged into a tow by coaxially aligning the tow with an adjacent separation layer and winding or wrapping the tow and separation layer onto a support structure in an interleaved manner so that the separation layer separates a wrap of the tow from an adjacent wrap of the tow. A coating can then be uniformly applied to the reinforcing fibers without defects caused by fiber tow to fiber tow contact. The separation layer can be a carbon fiber veil.Type: GrantFiled: August 30, 1999Date of Patent: January 2, 2001Assignee: General Electric CompanyInventor: Gregory Scot Corman
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Patent number: 6113349Abstract: A turbine assembly having a turbine stator, a ceramic inner shroud, and a first spring. The stator has a longitudinal axis and an outer shroud block with opposing and longitudinally outward facing first and second sides. The first side has a longitudinally outward projecting first ledge and has a first side portion located radially outward of the first ledge. The ceramic inner shroud has a first hook portion longitudinally and radially surrounding the first ledge. The first spring is attached to one of the first side portion and the first hook portion and unattachedly and resiliently contacts the other of the first side portion and the first hook portion.Type: GrantFiled: April 27, 1999Date of Patent: September 5, 2000Assignee: General Electric CompanyInventors: Bharat Sampathkumaran Bagepalli, Gregory Scot Corman, Anthony John Dean, Paul Stephen DiMascio, Massoud Mirdamadi
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Patent number: 5952100Abstract: A fiber-reinforced silicon--silicon carbide matrix composite having improved oxidation resistance at high temperatures in dry or water-containing environments is produced. The invention also provides a method for protecting the reinforcing fibers in the silicon--silicon carbide matrix composites by coating the fibers with a silicon-doped boron nitride coating.Type: GrantFiled: May 21, 1997Date of Patent: September 14, 1999Assignee: General Electric CompanyInventors: Gregory Scot Corman, Krishan Lal Luthra